Each command that you run from the COMMAND line is stored in a history file. You can access this file by clicking the H (history) command button to the right of the COMMAND line.

Clicking the H (history) command button to bring up the Command History log

You can re-run any command in this list by clicking in the row containing the command. When you click/select a command, it will be executed and this screen will close.
Click the Clear History button to clear the Command History file.
The Command History table is stored as C:\H2OS\PROFS\COMMAND_HISTORY.DBF